Can I update my Mac OS X 10.4.11 to a Mac OS X 10.5?

Depends on what model you have. Open System Profile in the Utlities folder and report what you find displayed as the Model Identifier.

If your procfessor speed is 867MHz or higher you can upgrade to Leopard. Otherwise you are at the max OS.

Mac OS X 10.5 Leopard installation system requirements

http://support.apple.com/kb/TA24950

Leopard is no longer available at the Apple Store but may be available by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753).

If you can't obtain a retail install DVD from Apple, look on eBay or Google the installer part numbers to possibly find at an on-line store. Here's what to look for:

MB427Z/A Leopard 10.5.1 install DVD

MB576Z/A Leopard 10.5.4 install DVD

MB021Z/A Leopard 10.5.6 install DVD (single user)

MB022Z/A Leopard 10.5.6 install DVD (5-user family pack)

Installing Mac OS X 10.5 Leopard

http://support.apple.com/kb/HT1544

Mac OS X 10.5 Leopard Installation and Setup Guide

http://manuals.info.apple.com/en/leopard_install-setup.pdf

After you install the base 10.5, download & install the 10.5.8 combo update at http://support.apple.com/downloads/Mac_OS_X_10_5_8_Combo_Update

The DVD should look like this

Caution - Leopard does not support classic mode. So, if you currently open OS 9 apps in classic mode, you won't be able to do this if you upgrade to Leopard.

 Cheers, Tom 😉

Got it, thanks. You reply to me by clicking to a Reply link in the lower right of one of my posts. For example I'm replying to you by clicking on the Reply link of your post to me:

Anyway, back to the question. Your computer can be upgraded to Leopard 10.5.8. However, to do so you will need to find a retail Leopard installer package. They are getting difficult to find, so you will need to search on amazon.com eBay, or Google to find a vendor. Be sure to only purchase a true retail package. They will cost you at least $129.00 or more. Your computer must also meet the other system requirements:

Leopard System requirements

You must have a Macintosh computer with:

• an Intel processor or a PowerPC G4 (867 MHz or faster) or G5 processor
• a DVD drive >built-in FireWire
• at least 512 MB of RAM (additional RAM is recommended for development purposes)
• a built-in display or a display connected to an Apple-supplied video card supported by your computer
• at least 9 GB of disk space available, or 12 GB of disk space if you install the developer tools

Right.

(66798)

That is a pretty old computer by tech standards (more than five years.) I would be inclined to buy a new one rather than spend money on an old one. But if it does all you wish to do, then there is no reason to get rid of it. You can install up to 2 GBs of RAM - 2 - PC-2700 DDR333 200-pin SO-DIMMs. That's ample for using Leopard.

You cannot "add" hard drive space. You can put in a larger hard drive or you can delete unneeded files from the hard drive to regain space. The computer uses Ultra ATA/100 (ATA-6) drives, so you can look for what's available from vendors on the Internet. Be sure you are looking at notebook, 2.5" PATA, sized drive's. Installing may be a bit of a challenge. You should find useful information on disassembly at ifixit.com or macsales.com.

To free up space: visit The XLab FAQs and read the FAQ on freeing up space on a hard drive. Also see Freeing space on your Mac OS X startup disk.